Power Springs
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Global Manufacturing of Springs The Lesjöfors Group also includes Ihr Spezialist für technische Federn

LESJÖFORS SPRINGS AMERICA, INC. As an industry leader in the design and manufacture of custom engineered flat mechanical springs and spring assemblies, Lesjöfors Springs America, Inc. has the proven ability to satisfy the requirements of the most demanding customer applications, while offering the assurances of exceptional quality, performance, and customer service. Our heritage in spring manufacturing extends back to 1926 when we supplied clock springs for the watch industry. Since then, we have matured our flat strip spring manufacturing processes to provide a myriad of products for...

• Servo-controlled flat strip spring coilers • Servo-controlled cut-to-length universal spring cutting lines • On-site tool & die and maintenance • Tempering for both batch and in-line material stress relieving • Winding & back winding into customer specified housings/keepers • Riveting and flush riveting for component assembly • Value-added assemblies • Torque and life cycle testing (as required by customer) • Certificate of conformance • Standard and specialized packaging • Fully staffed warehousing operations • Raw material stocking for many common grades, thickness, and widths • Managed...

Lesjöfors Springs Our product portfolio includes a wide variety of flat spring categories such as constant force springs, constant torque springs, hair springs (clock springs), power springs, and reels. All products are designed and manufactured to each customer’s unique performance and size requirements. Applications From small electronic and precision instrumentation springs to large industrial springs, we confidently serve engineers and buyers of OEM and replacement spring components in almost every area of apparatus and equipment manufacturing. Applications for our springs include...

Constant Force Springs Constant force springs achieve nearly constant retraction force by paying off material from a spool. Commonly used for displays and counterbalances. Constant force springs are manufactured from flat strip material and spooled to a specific free diameter to give the needed pull force. Constant Force Extension Springs are used in a wide variety of applications where a constant pull force is needed. Applications for constant force springs include window balancers, counter balances, and point-of-purchase shelving and displays. Constant Torque Springs Constant torque...

Power Springs Power Springs are identified by the many coils of strip material stored in a case, barrel, or band, and connected to a central arbor or shaft. When this shaft is rotated, the material starts to wind flat against it. This action creates an increasing torque for as many turns as it can be wound until there is no material left. Our capabilities range from 0.002 inch to 0.125 inch material thickness and from 0.030 inch to 3 inch material widths. Springs can be made using pre-stressed (back wound) or conventional (from flat) methods. Pre-stressed springs are spooled to a special...

Hair Springs Hair springs (clock spring or open spiral springs), can be used in a wide variety of applications where working turns are low and a linear increasing torque is needed. The torque output on a hair spring produces a linear torque profile because the spring coils don’t normally come in contact with each other. Therefore, there will be no output torque loss due to friction. The material sizes used are similar to power springs, leading to varying product sizes from large counter balances and actuators to components of small medical devices and instrumentation. Applications for hair...

Reels Reels are self-contained spring units that are designed for ease of use and flexibility in any application. They allow for fast installation and are available with cables attached externally and with a variety of arbor configurations. Designs are also available that completely enclose the spring with a lightweight durable outer shell. The spring assembly and cord/cable are contained internally. Our capabilities also allow us to custom engineer a reel for your application to ensure the performance meets your specific requirements. Applications for reels include elevator door assists,...

Technical Development The performance of your spring or strip component is crucial for the function of your application. To determine the products performance, Lesjöfors makes calculations and simulations that later are verified through measuring and testing. We have the capacity to calculate, measure and test all types of springs, from very small and thin strip components to heavy power springs. Complete Development Partner Lesjöfors’ wide network of product and manufacturing science includes fields as material, surface treatment, cosmetics, dimensioning, manufacturing, testing and quality...

In Constant Motion The Lesjofors group is continuously improving. In close cooperation with our customers we constantly evolve. As their leading spring supplier our globally recognized customers challenge us to extend the boundaries of our technical expertise every day. By moving forward area by area and by setting in stone action plans our ultimate objective is to provide an unrivaled service for all our customers. Quality Our management systems are third party approved according to ISO 9001. Some subsidiaries are also third party approved according to TS 16949, which is a quality standard...

Lesjöfors Springs America Quality Policy Complete customer satisfaction is the goal of Lesjöfors Springs America’s way of conducting business. Quality is a measure of our performance as seen by our customer, our success in the market will depend on our ability to meet or exceed customer expectations for quality. Our commitment, which is supported by our employees, depends on each one of us taking full responsibly for the quality in everything we do. Satisfied Customers • At Lesjöfors Springs America, we are committed to providing our customers with products and services that meet or exceed...